Pretty much nowhere pleasant in the world actually wants Americans, and it is uniquely hard for them to gain residency or long-term/renewable visas. This is partially due to our own tendency to alienate other countries to the point where they don't want to form any serious ties with us.
I plan to try to move to the UK permanently again, but with a better game plan. You have to really, really want it just to get your foot in the door. Keeping it there is a whole nother battle. Trying to inch forward is a blitzkrieg.